N-alkyldithienopyrrole and Bithiazole-based Copolymers for Transistor Applications

摘要

Organic and polymeric semiconductors are potential active components in electronic devices and have received considerable attention due to the promise of high efficiencies and fabrication of mechanically flexible devices. Solution processing techniques such as spin coating, inkjet printing, and screen printing allow for large-area fabrication, thus offering a significant advantage over existing inorganic materials in terms of ease of processing and reduced costs. Even more importantly, the electronic and optical properties of conjugated polymers can be readily tuned by controlling the π conjugation and connectivity through polymer engineering. To truly take advantage of these properties for FETs, organic semiconductors require high charge carrier mobility, good air stability, and processability. Unfortunately, only a few polymers have mobilities above 0.1 cm~2V~(-1)s~(-1) with on/off currents above 10~5, which are desirable for many applications.10~(-17) Thus designing and synthesizing new polymers with good FET performance, and understanding their morphology dependence on charge carrier mobilities, is still an important area of research.